title: Presence of benzoate type toxins in Gymnodinium catenatum Graham isolated from the Mexican Pacific.
abstract: Benzoate type toxins have been described as an important component of Gymnodinium catenatum cells. In this paper we study these toxins in a G. catenatum strain isolated from the Mexican coast. A partition of the toxins was done by solid-phase extraction on a COOH cartridge and detected by HPLC coupled to fluorescence after pre-column periodate oxidation. Two groups of the hydrophobic analogues of saxitoxin were identified: those containing a sulphate group in the benzoate moiety instead of a hydroxyl group like GC1/2 or GC3 and the hydroxy-benzoate analogues, with a sulphate group at the eleventh position of the STX core present or absent (GCs-GTX and GCs-STX analogues, respectively). These toxins are more abundant, in a relative basis, when comparing with a G. catenatum toxin content isolated from Portugal. This is the first report of the presence of these toxins in a Mexican strain.
authors.affiliation: Centro de Investigaciones Biológicas del Noroeste, Mar Bermejo 195, Col. Playa Palo de Santa Rita, La Paz, B.C.S. 23096, Mexico. jose04@cibnor.mx
authors.forename: J
authors.initials: J
authors.lastname: Bustillos-Guzmán
authors.forename: P
authors.initials: P
authors.lastname: Vale
authors.forename: C
authors.initials: C
authors.lastname: Band-Schmidt
mesh_terms: D001565:Benzoates / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid; D004141:Dinoflagellida / Q000737:chemistry*; D005453:Fluorescence; D008387:Marine Toxins / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D008800:Mexico; D010140:Pacific Ocean; D052616:Solid Phase Extraction
chemical_list: D001565:Benzoates; D008387:Marine Toxins